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采用在原位聚合苯胺的反应介质中分散碳化钨(WC)的方法制备了掺杂聚苯胺/碳化钨(PANI/WC)复合物,并研究了苯胺在WC表面的聚合机理.通过扫描电镜(SEM)、透射电镜(TEM)、傅立叶红外光谱(FTIR)、拉曼光谱(Raman)和X射线衍射(XRD)对复合物进行了表征.结果表明,苯胺的聚合倾向于在WC颗粒表面进行,形成了PANI包覆WC的复合材料;WC粒子与PANI大分子之间存在强的相互作用,并且复合前后WC的晶型并未发生变化,WC的存在导致红外光谱有明显的蓝移现象,复合后在3446 cm-1处的红外吸收峰变得很弱;在拉曼光谱中,代表醌环C N键的伸缩振动峰红移了9 cm-1,并且强度也有很大程度提高.说明PANI与WC之间有化学键的作用,它们之间的化学键作用发生在C N键的N原子上.聚合反应优先在WC粒子表面进行,生成PANI包覆结构,并提出了PANI/WC复合物的形成机制.
The polyaniline / tungsten carbide (PANI / WC) composite was prepared by dispersing tungsten carbide (WC) in the in situ polymerization of aniline and the polymerization mechanism of aniline on the WC surface was investigated. The scanning electron microscopy SEM, TEM, FTIR, Raman and XRD.The results showed that the polymerization of aniline tended to proceed on the surface of WC particles, PANI-coated WC composites were formed. There was a strong interaction between WC particles and PANI macromolecules, and the crystal form of WC did not change before and after composites. The presence of WC led to a significant blue shift in the infrared spectrum, The infrared absorption peak at 3446 cm-1 became very weak; in Raman spectrum, the stretching vibration peak representing the quinone ring CN bond red shifted 9 cm-1, and the intensity was also greatly improved. WC chemical bond between the role of the chemical bond between them occurs in the CN bond of the N atom. Polymerization priority in the WC particle surface to generate PANI coating structure and proposed PANI / WC composite formation mechanism.